CN108233870A - The photovoltaic system hot spot fault test set and method of CTCT structures - Google Patents
The photovoltaic system hot spot fault test set and method of CTCT structures Download PDFInfo
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- CN108233870A CN108233870A CN201810095907.9A CN201810095907A CN108233870A CN 108233870 A CN108233870 A CN 108233870A CN 201810095907 A CN201810095907 A CN 201810095907A CN 108233870 A CN108233870 A CN 108233870A
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- 238000012360 testing method Methods 0.000 title claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 230000005611 electricity Effects 0.000 claims description 7
- 238000007689 inspection Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses the photovoltaic system hot spot fault test sets and method of a kind of CTCT structures,The equipment includes detection device,Processor,Feedback device,The second current value of second layer current sensor is obtained by detecting device,When processor judges that the difference of second current value and the second standard current value is more than the second current threshold,Illustrate that there are hot spot effects for the photovoltaic module,Device is then detected to continue to obtain multiple first current values of first layer current sensor,When processor judges the size of the difference of the first corresponding standard current value of each first current value,If difference is more than the second standard current value,Illustrate that there are hot spot effects for the corresponding photovoltaic cell group of first current value,Feedback device outwardly feeds back information of the corresponding photovoltaic cell group of first current value there are hot spot failure at this time,Therefore staff can know hot spot phenomenon in time by the feedback of feedback device.
Description
Technical field
The present invention relates to technology field of photovoltaic power generation, more specifically to a kind of photovoltaic system hot spot of CTCT structures
Fault test set further relates to a kind of photovoltaic system hot spot fault detection method of CTCT structures.
Background technology
Solar energy is a kind of sustainable free of contamination green clean energy resource (also as photovoltaic), abundant in solar energy resources
Area, people have developed photovoltaic generating system to realize the collection and utilization to solar energy.It is main existing for photovoltaic system at present
Problem is hot spot failure.Hot spot failure refers to that photovoltaic cell due to being blocked for a long time, leads to the photovoltaic cell in photovoltaic system
The current value of generation is less than current value caused by other photovoltaic cells for not being blocked, according to Kirchhoff's second law, this
The photovoltaic cell being blocked a bit can negatively charged pressure, become the load in entire photovoltaic generating system, and it is consumed with form of heat
Power caused by the photovoltaic cell that he works normally, and this heat long time integration can damage the package material of photovoltaic system
Material or even destruction physical arrangement, cause permanent damage.It can be seen that hot spot phenomenon can not only reduce photovoltaic generating system
Generating efficiency, it is also possible to system physical arrangement itself can be damaged, therefore find in time and eliminate hot spot stock failure particularly
It is important.
However in practical application, in order to obtain better solar energy collecting effect, generally photovoltaic generating system is set
It puts in remote High aititude Desert Area, these areas have the problems such as having inconvenient traffic, bad environments, to staff to photovoltaic
The inspection of system and monitoring band carry out many difficulties.
It is mesh in conclusion how to provide a kind of scheme that the hot spot failure in photovoltaic system is known convenient for staff
Preceding those skilled in the art's urgent problem to be solved.
Invention content
The object of the present invention is to provide the photovoltaic system hot spot fault test sets and method of a kind of CTCT structures, can be convenient for
Staff knows the hot spot failure in photovoltaic system, and then eliminates hot spot failure.
To achieve these goals, the present invention provides following technical solution：
A kind of photovoltaic system hot spot fault test set of CTCT structures, including：Detect device, processor, feedback device；
The detection device, is used for：Obtain the second layer electricity of current photovoltaic module in the photovoltaic system of the CTCT structures
Second current value of flow sensor；
The processor, is used for：Compare the size of second current value and preset second standard current value, if described
Second current value and the difference of second standard current value are more than or equal to preset second current threshold, then control the detection
Device obtains multiple first current values of first layer current sensor, relatively more each first current value and first electric current
It is worth the size of preset corresponding first standard current value, if first current value and first current value corresponding first
The difference of standard current value is more than or equal to preset first current threshold, then the feedback device is controlled outwardly to feed back described the
There are the information of hot spot failure for the corresponding photovoltaic cell group of one current value；
Wherein, second current value is the sum of multiple described first current values, and each first current value is described
The size of current of each photovoltaic cell group in current photovoltaic module.
Preferably, the feedback device is warning light corresponding with the photovoltaic cell group.
Preferably, the feedback device is voice device, for outwardly reporting first electric current in the form of speech
It is worth information of the corresponding photovoltaic cell group there are hot spot failure.
Preferably, the feedback device is communicator, for described information to be sent to monitor terminal.
Preferably, the communicator is additionally operable to：The second layer of the current photovoltaic module electricity that the detection device is got
Second current value of flow sensor is sent to the monitor terminal.
Preferably, the communicator is additionally operable to described information being sent to preset mobile equipment.
A kind of photovoltaic system hot spot fault detection method of CTCT structures, including：
Obtain the second electric current of the second layer current sensor of current photovoltaic module in the photovoltaic system of the CTCT structures
Value；
Compare the size of second current value and preset second standard current value；
If second current value and the difference of second standard current value are more than or equal to preset second current threshold,
Then obtain multiple first current values of first layer current sensor；
Compare the big of each first current value and preset corresponding first standard current value of first current value
It is small；
If the difference of first current value the first standard current value corresponding with first current value is more than or equal to pre-
If the first current threshold, then outwardly feed back letter of the corresponding photovoltaic cell group of first current value there are hot spot failure
Breath；
Wherein, second current value is the sum of multiple described first current values, and each first current value is described
The size of current of each photovoltaic cell group in current photovoltaic module.
Preferably, it is described outwardly to feed back information of the corresponding photovoltaic cell group of first current value there are hot spot failure
Including：
Control warning light corresponding with the photovoltaic cell group outwardly feeds back the corresponding photovoltaic electric of first current value
There are the information of hot spot failure for pond group.
Preferably, it is described outwardly to feed back information of the corresponding photovoltaic cell group of first current value there are hot spot failure
Including：
Control voice device is outwardly reported the corresponding photovoltaic cell group of first current value and is existed in the form of speech
The information of hot spot failure.
Preferably, it is described outwardly to feed back information of the corresponding photovoltaic cell group of first current value there are hot spot failure
Including：
Described information is sent to monitor terminal by control communicator.
A kind of photovoltaic system hot spot fault test set of CTCT structures provided by the invention, including：Detect device, processing
Device, feedback device；The detection device, is used for：Obtain second of current photovoltaic module in the photovoltaic system of the CTCT structures
Second current value of layer current sensor；The processor, is used for：Compare second current value and preset second standard electric
The size of flow valuve, if second current value and the difference of second standard current value are more than or equal to preset second current threshold
Value then controls the detection device to obtain multiple first current values of first layer current sensor, relatively more each first electricity
The size of flow valuve and preset corresponding first standard current value of first current value, if first current value and described the
The difference of corresponding first standard current value of one current value is more than or equal to preset first current threshold, then controls the ultramagnifier
Part outwardly feeds back information of the corresponding photovoltaic cell group of first current value there are hot spot failure；Wherein, second electricity
Flow valuve is the sum of multiple described first current values, and each first current value is the light each in the current photovoltaic module
Lie prostrate the size of current of battery pack.
The present invention obtains the second current value of second layer current sensor by detecting device, when processor judge this
When the difference of two current values and the second standard current value is more than the second current threshold, illustrate the photovoltaic module there are hot spot effect,
Then detect device continue obtain first layer current sensor multiple first current values, processor judge each first current value and
The size of the difference of its corresponding first standard current value if difference is more than the second standard current value, illustrates first current value pair
There are hot spot effects, at this time feedback device outwardly to feed back the corresponding photovoltaic cell group of first current value for the photovoltaic cell group answered
There are the information of hot spot failure, therefore staff can know hot spot phenomenon in time by the feedback of feedback device.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is that a kind of structure of the photovoltaic system hot spot fault test set of CTCT structures provided in an embodiment of the present invention is shown
It is intended to；
Fig. 2 is a kind of structure diagram of the photovoltaic system of CTCT structures provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the photovoltaic system hot spot failure inspection it illustrates a kind of CTCT structures provided in an embodiment of the present invention
The structure diagram of measurement equipment can include：
Detect device 11, processor 12, feedback device 13；
Device 11 is detected, is used for：Obtain the second layer current sense of current photovoltaic module in the photovoltaic system of CTCT structures
Second current value of device；
Processor 12, is used for：Compare the size of the second current value and preset second standard current value, if the second current value
It is more than or equal to preset second current threshold with the difference of the second standard current value, then control detector part 11 obtains first layer electricity
Multiple first current values of flow sensor, more each first current value and preset corresponding first standard electric of the first current value
The size of flow valuve, if the difference of the first current value the first standard current value corresponding with the first current value is more than or equal to preset the
One current threshold, then feedback device 13 is controlled outwardly to feed back the corresponding photovoltaic cell group of the first current value, and there are hot spot failures
Information；Wherein, the second current value is the sum of multiple first current values, and each first current value is each light in current photovoltaic module
Lie prostrate the size of current of battery pack.
For the photovoltaic system of a CTCT structure, which is usually connected in series by polylith photovoltaic module,
Each piece of photovoltaic module is connected again by multiple photovoltaic cells, wherein three every (can also be remaining rational quantity) photovoltaic
Battery one current sensor of series connection forms a photovoltaic cell group.
It is illustrated below with a specific example：
Referring to Fig. 2, it illustrates a kind of structural representations of the photovoltaic system of CTCT structures provided in an embodiment of the present invention
Figure, it is assumed that photovoltaic system has two pieces of photovoltaic modulies, respectively the first photovoltaic module 21 and the second photovoltaic module 22, every piece
Photovoltaic module is connected by nine photovoltaic cells, wherein every three adjacent photovoltaic cells are connected, a current sensor is formed
One photovoltaic cell group is known as first layer current sensor 211, Suo You with the current sensor that photovoltaic cell group is directly connected
One layer of current sensor 211 is connected with another current sensor, which is second layer current sensor 212.
In the hot spot failure for detecting the photovoltaic system, the detection to the first photovoltaic module 21 and the second photovoltaic module 22
Journey is identical, therefore the detection process of the first photovoltaic module 21 need to will be only described.Detection device 11 obtains first
Take the current value I of the second layer current sensor 212 of the first photovoltaic module 214, it should be noted that relevant staff integrates
Consider the working performance and environment of photovoltaic system, the theoretical value I of a second layer current sensor current value can be obtained4 is theoretical,
If I4With I4 is theoreticalDifference be less than preset second threshold, then illustrate I4With I4 is theoreticalApproximately equal illustrates the first photovoltaic module
21 normal works, do not generate hot spot failure；, whereas if I4With I4 is theoreticalDifference be more than preset second threshold, then illustrate the
There are hot spot effect in one photovoltaic module 21, but since the first photovoltaic module 21 is connected in series by three photovoltaic cell groups, this
When not can determine that it is that hot spot failure has occurred in which photovoltaic cell group color development, need further to be detected.Second threshold
Size should be configured according to actual conditions.
By the structure of the first photovoltaic module 21 it is recognised that the current value of second layer current sensor 212 should be equal to respectively
A first layer current sensor 211 (the first current sensor of first layer 2111, the second current sensor of first layer 2112, first
Layer third current sensor 2113) the sum of electric current, and the size of current of each first layer current sensor 211 should distinguish approximation
Equal to 1/3rd of the current value of second layer current sensor 212, if detection device 11 detects any one first layer electricity
The current value of flow sensor 211 and the difference of I4/3 are more than preset first threshold, for example, the first current sensor of first layer
The difference of 2111 current value I1 and I4/3 are more than preset first threshold, then illustrate that first layer the first current sensor 2111 is right
There are hot spot failures, at this time feedback device 13 outwardly to send out the first photovoltaic electric of first layer for first layer the first photovoltaic cell group answered
Pond group there are hot spot failure information, so as to staff in time according to the information exclude hot spot failure.
It should be noted that in practical applications, photovoltaic module quantity, each photovoltaic in the photovoltaic system of CTCT structures
In component the quantity of photovoltaic cell and by how many a photovoltaic cells be connected into photovoltaic cell group etc. not necessarily with this example
In it is identical, as long as the detection thought in this specification used, all belongs to the scope of protection of the present invention.
The present invention obtains the second current value of second layer current sensor by detecting device, when processor judge this
When the difference of two current values and the second standard current value is more than the second current threshold, illustrate the photovoltaic module there are hot spot effect,
It then detects device to continue to obtain multiple first current values of first layer current sensor, when processor judges each first current value
The size of the difference of the first corresponding standard current value if difference is more than the second standard current value, illustrates first current value
There are hot spot effects, at this time feedback device outwardly to feed back the corresponding photovoltaic cell of the first current value for corresponding photovoltaic cell group
Group is there are the information of hot spot failure, therefore staff can know hot spot phenomenon in time by the feedback of feedback device.
In the present invention, feedback device 13 can be warning light corresponding with each photovoltaic cell group, and processor 12 is judged
The difference of the corresponding standard value of the current value of first layer current sensor 211 corresponding with some photovoltaic cell group is more than pre-
If first threshold when, warning light corresponding with the battery pack can send out prompting light, so as to staff in time according to should
Fluorescent tube knows the position for having hot spot failure to occur and quickly determining the generation of hot spot failure.
Feedback device 13 can also be voice device, remind relevant staff that there are hot spot events at this time with the form of voice
Barrier.Warning light and voice device can facilitate staff quickly to know hot spot failure when staff is to scene inspection
Generation and in time determine hot spot failure occur position.
But since photovoltaic system is generally positioned at Desert Area, the inconvenience of traffic and the severe of environment give staff's
Inspection brings inconvenience, and therefore, feedback device 13 can also be communicator, and the message that hot spot effect occurs is sent to monitoring eventually
End positioned at the staff of monitor terminal can be on the scene and eliminate hot spot failure in time upon receiving the message, work
Personnel need to only be on the scene after the message for receiving communicator so that but there is no heat after staff to scene inspection
The situation of spot failure no longer occurs, and improves work efficiency.
As preference, communicator can also be by the second layer current sensor 212 of the current photovoltaic module got
Second current value is sent to monitor terminal, and staff can know the light according to the variation tendency of the second current value received
Lie prostrate component working condition, prediction photovoltaic module it is possible that failure problems, take measures on customs clearance before problems arise
Failure is avoided to occur.
As preference, hot spot fault message can also be sent to preset mobile equipment by communicator, which can be with
When and where no matter mobile phone for relevant staff etc., the staff can know the hot spot failure of photovoltaic system in time
Information, and then eliminate hot spot failure in time.
The embodiment of the present invention additionally provides a kind of photovoltaic system hot spot fault detection method of CTCT structures, including：
Obtain the second current value of the second layer current sensor of current photovoltaic module in the photovoltaic system of CTCT structures；
Compare the size of the second current value and preset second standard current value；
If the difference of the second current value and the second standard current value is more than or equal to preset second current threshold, the is obtained
Multiple first current values of one layer of current sensor；
Compare size of each first current value with preset corresponding first standard current value of the first current value；
If the difference of the first current value the first standard current value corresponding with the first current value is more than or equal to preset first
Current threshold then outwardly feeds back information of the corresponding photovoltaic cell group of the first current value there are hot spot failure；
Wherein, the second current value is the sum of multiple first current values, and each first current value is every in current photovoltaic module
The size of current of a photovoltaic cell group.
The embodiment of the present invention additionally provides a kind of photovoltaic system hot spot fault detection method of CTCT structures, outwardly feeds back
There are the information of hot spot failure to include for the corresponding photovoltaic cell group of first current value：
Control warning light corresponding with photovoltaic cell group, which outwardly feeds back the corresponding photovoltaic cell group of the first current value, to be existed
The information of hot spot failure.
The embodiment of the present invention additionally provides a kind of photovoltaic system hot spot fault detection method of CTCT structures, outwardly feeds back
There are the information of hot spot failure to include for the corresponding photovoltaic cell group of first current value：
Control voice device outwardly reports the corresponding photovoltaic cell group of the first current value in the form of speech, and there are hot spots
The information of failure.
The embodiment of the present invention additionally provides a kind of photovoltaic system hot spot fault detection method of CTCT structures, outwardly feeds back
There are the information of hot spot failure to include for the corresponding photovoltaic cell group of first current value：
Control communicator sends information to monitor terminal.
The embodiment of the present invention additionally provides a kind of photovoltaic system hot spot fault detection method of CTCT structures, further includes：
Second current value of the second layer current sensor of the current photovoltaic module got is sent to by control communicator
Monitor terminal.
The embodiment of the present invention additionally provides a kind of photovoltaic system hot spot fault detection method of CTCT structures, further includes：
Control communicator sends information to preset mobile equipment.
Relevant portion in a kind of photovoltaic system hot spot fault detection method of CTCT structures provided in an embodiment of the present invention
Illustrate to refer to corresponding part in the photovoltaic system hot spot clothes detection devices of CTCT structures provided in an embodiment of the present invention a kind of
Detailed description, details are not described herein.In addition, in above-mentioned technical proposal provided in an embodiment of the present invention with it is corresponding in the prior art
The consistent part of technical solution realization principle is simultaneously unspecified, in order to avoid excessively repeat.
The foregoing description of the disclosed embodiments enables those skilled in the art to realize or use the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
The embodiments shown herein is formed on, and is to fit to consistent with the principles and novel features disclosed herein most wide
Range.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include that
A little elements, but also including other elements that are not explicitly listed or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except also there are other identical elements in the process, method, article or apparatus that includes the element.
Claims (10)
1. a kind of photovoltaic system hot spot fault test set of CTCT structures, which is characterized in that including：Detect device, processor,
Feedback device；
The detection device, is used for：The second layer electric current for obtaining current photovoltaic module in the photovoltaic system of the CTCT structures passes
Second current value of sensor；
The processor, is used for：Compare the size of second current value and preset second standard current value, if described second
Current value and the difference of second standard current value are more than or equal to preset second current threshold, then control the detection device
Multiple first current values of first layer current sensor are obtained, relatively more each first current value and first current value are pre-
If corresponding first standard current value size, if first current value the first standard corresponding with first current value
The difference of current value is more than or equal to preset first current threshold, then the feedback device is controlled outwardly to feed back first electricity
There are the information of hot spot failure for the corresponding photovoltaic cell group of flow valuve；
Wherein, second current value is the sum of multiple described first current values, and each first current value is described current
The size of current of each photovoltaic cell group in photovoltaic module.
2. equipment according to claim 1, which is characterized in that the feedback device is corresponding with the photovoltaic cell group
Warning light.
3. equipment according to claim 1, which is characterized in that the feedback device is voice device, for voice
Form outwardly reports information of the corresponding photovoltaic cell group of first current value there are hot spot failure.
4. equipment according to claim 1, which is characterized in that the feedback device is communicator, for by described information
It is sent to monitor terminal.
5. equipment according to claim 4, which is characterized in that the communicator is additionally operable to：The detection device is obtained
To the second current value of second layer current sensor of current photovoltaic module be sent to the monitor terminal.
6. equipment according to claim 4, which is characterized in that the communicator is additionally operable to described information being sent to default
Mobile equipment.
7. a kind of photovoltaic system hot spot fault detection method of CTCT structures, which is characterized in that including：
Obtain the second current value of the second layer current sensor of current photovoltaic module in the photovoltaic system of the CTCT structures；
Compare the size of second current value and preset second standard current value；
If second current value and the difference of second standard current value are more than or equal to preset second current threshold, obtain
Take multiple first current values of first layer current sensor；
Compare size of each first current value with preset corresponding first standard current value of first current value；
If the difference of first current value the first standard current value corresponding with first current value is more than or equal to preset
First current threshold then outwardly feeds back information of the corresponding photovoltaic cell group of first current value there are hot spot failure；
Wherein, second current value is the sum of multiple described first current values, and each first current value is described current
The size of current of each photovoltaic cell group in photovoltaic module.
8. the method according to the description of claim 7 is characterized in that described outwardly feed back the corresponding light of first current value
There are the information of hot spot failure to include for volt battery pack：
Control warning light corresponding with the photovoltaic cell group outwardly feeds back the corresponding photovoltaic cell group of first current value
There are the information of hot spot failure.
9. the method according to the description of claim 7 is characterized in that described outwardly feed back the corresponding light of first current value
There are the information of hot spot failure to include for volt battery pack：
Control voice device outwardly reports the corresponding photovoltaic cell group of first current value in the form of speech, and there are hot spots
The information of failure.
10. the method according to the description of claim 7 is characterized in that described, outwardly to feed back first current value corresponding
There are the information of hot spot failure to include for photovoltaic cell group：
Described information is sent to monitor terminal by control communicator.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964606A (en) * | 2018-08-23 | 2018-12-07 | 上海电气分布式能源科技有限公司 | A kind of photovoltaic system hot spot fault detection method |
| WO2021232257A1 (en) * | 2020-05-19 | 2021-11-25 | 华为数字能源技术有限公司 | Photovoltaic system |
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